Get some seafoam
Put some in the gas tank run the generator with about one half load
For half the tank
Shut down let it rest and soak for 48 hours
Then start it and run it dry
This should clean the carb and fuel lines of any deposits
Then try your A/C
It should be noted, don't wait until afternoon and it's 100°
In the TT to run the generator and A/C
A hot a/c unit is much harder to start than a cool one
Try your a/c in morning before it before is is heat soaked from the sun
The start surge on compressor will be less
The start cap for compressor might be headed south